Finding the Fourth Proportional to 52,533.72, 78,628.05 and 39,986.01

Step by Step Solution

1. Step 1: Write the proportion equation
   52,533.72 : 78,628.05 = 39,986.01 : x
2. Step 2: Convert to fraction form
   52,533.72/78,628.05 = 39,986.01/x
3. Step 3: Cross multiply
   52,533.72x = 78,628.05 × 39,986.01
4. Step 4: Simplify right side
   52,533.72x = 3,144,021,993.58
5. Step 5: Solve for x
   x = 3,144,021,993.58/52,533.72
6. Step 6: Final answer
   x = 59,847.69